Abrasive sharpener



FIG. 1 is a front perspective view of the ornamental design for an abrasive sharpener of the invention;

FIG. 2 is a left end elevational view, of the ornamental design for an abrasive sharpener of FIG. 1;

FIG. 3 is a rear elevational view of the ornamental design for an abrasive sharpener of FIG. 1;

FIG. 4 is a right end elevational view of the ornamental design for an abrasive sharpener of FIG. 1;

FIG. 5 is a front elevation view of the ornamental design for an abrasive sharpener of FIG. 1;

FIG. 6 is a top plan view of the ornamental design for an abrasive sharpener of FIG. 1; and,

FIG. 7 is a bottom plan view of the ornamental design for an abrasive sharpener of FIG. 1.

The broken line structure in FIG. 7 forms no part of the claimed design. 

The ornamental design for an abrasive sharpener, as shown and described. 